<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
This schedule contains Summary Financial Information extracted from the Form
N-SAR and the financial statements and is qualified in its entirety by
references to such documents.
</LEGEND>
<SERIES>
   <NUMBER> 031
   <NAME> NUVEEN FLAGSHIP ALL-AMERICAN MUNI BOND FUND - CLASS A
<MULTIPLIER> 1000

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          APR-30-2000
<PERIOD-START>                             MAY-01-1999
<PERIOD-END>                               APR-30-2000
<INVESTMENTS-AT-COST>                           357813
<INVESTMENTS-AT-VALUE>                          352217
<RECEIVABLES>                                    17663
<ASSETS-OTHER>                                     518
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  370398
<PAYABLE-FOR-SECURITIES>                          6196
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1974
<TOTAL-LIABILITIES>                               8170
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        376999
<SHARES-COMMON-STOCK>                            25068
<SHARES-COMMON-PRIOR>                            27307
<ACCUMULATED-NII-CURRENT>                            4
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         (9178)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        (5597)
<NET-ASSETS>                                    362228
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                24390
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    3964
<NET-INVESTMENT-INCOME>                          20426
<REALIZED-GAINS-CURRENT>                        (9176)
<APPREC-INCREASE-CURRENT>                      (31918)
<NET-CHANGE-FROM-OPS>                          (20668)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        15132
<DISTRIBUTIONS-OF-GAINS>                           654
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          13501
<NUMBER-OF-SHARES-REDEEMED>                      16168
<SHARES-REINVESTED>                                428
<NET-CHANGE-IN-ASSETS>                         (64588)
<ACCUMULATED-NII-PRIOR>                              1
<ACCUMULATED-GAINS-PRIOR>                         1109
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             1939
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   4001
<AVERAGE-NET-ASSETS>                            285414
<PER-SHARE-NAV-BEGIN>                            11.43
<PER-SHARE-NII>                                    .56
<PER-SHARE-GAIN-APPREC>                         (1.08)
<PER-SHARE-DIVIDEND>                             (.56)
<PER-SHARE-DISTRIBUTIONS>                        (.02)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.33
<EXPENSE-RATIO>                                    .83


</TABLE>